<template>
  <div :id='containerId' style='position: relative'>

    <!--  ---------------------------- begin 图片左右换位置 ------------------------------------- -->
    <div class='movety-container' :style="{top:top+'px',left:left+'px',display:moveDisplay}"
      style='padding:0 8px;position: absolute;z-index: 91;height: 32px;width: 104px;text-align: center;'>
      <div :id="containerId+'-mover'" :class="showMoverTask?'uploadty-mover-mask':'movety-opt'"
        style='margin-top: 12px'>
        <a @click='moveLast' style='margin: 0 5px;'>
          <a-icon type='arrow-left' style='color: #fff;font-size: 16px' />
        </a>
        <a @click='moveNext' style='margin: 0 5px;'>
          <a-icon type='arrow-right' style='color: #fff;font-size: 16px' />
        </a>
      </div>
    </div>
    <!--  ---------------------------- end 图片左右换位置 ------------------------------------- -->

    <a-upload name='file' :multiple='multiple' :action='uploadAction' :headers='headers' :data="{'biz':bizPath}"
      :fileList='fileList' :beforeUpload='doBeforeUpload' @change='handleChange' :disabled='disabled'
      :returnUrl='returnUrl' :listType='complistType' @preview='handlePreview' :class="{'uploadty-disabled':disabled}">
      <template>
        <a-button>
          {{ text }}
        </a-button>
      </template>
    </a-upload>
    <a-modal :visible='previewVisible' :footer='null' @cancel='handleCancel'>
      <img alt='example' style='width: 100%' :src='previewImage' />
    </a-modal>
    <file-preview @close='filePreviewShow = false' :imgList='[previewUrl]'
      :filePreviewShow='filePreviewShow'></file-preview>
  </div>
</template>

<script>

import Vue from 'vue'
import { ACCESS_TOKEN } from '@/store/mutation-types'
import { getFileAccessHttpUrl } from '@/api/manage'
import { fileBaseUrl, apiBaseUrlDownload } from '@/utils/request'
import FilePreview from '@/components/fileActions/FilePreview'
import '@/assets/less/public.less'

const FILE_TYPE_ALL = 'all'
const FILE_TYPE_IMG = 'image'
const FILE_TYPE_TXT = 'file'
const uidGenerator = () => {
  return '-' + parseInt(Math.random() * 10000 + 1, 10)
}
const getFileName = (path) => {
  if (path.lastIndexOf('\\') >= 0) {
    let reg = new RegExp('\\\\', 'g')
    path = path.replace(reg, '/')
  }
  return path.substring(path.lastIndexOf('/') + 1)
}
export default {
  name: 'JUpload',
  components: { FilePreview },
  data() {
    return {
      uploadAction: '',
      headers: {},
      fileList: [],
      newFileList: [],
      uploadGoOn: true,
      previewVisible: false,
      filePreviewShow: false,
      previewUrl: '',
      //---------------------------- begin 图片左右换位置 -------------------------------------
      previewImage: '',
      containerId: '',
      top: '',
      left: '',
      moveDisplay: 'none',
      showMoverTask: false,
      moverHold: false,
      currentImg: ''
      //---------------------------- end 图片左右换位置 -------------------------------------
    }
  },
  props: {
    text: {
      type: String,
      required: false,
      default: '点击上传'
    },
    fileType: {
      type: String,
      required: false,
      default: FILE_TYPE_ALL
    },
    /*这个属性用于控制文件上传的业务路径*/
    bizPath: {
      type: String,
      required: false,
      default: 'temp'
    },
    value: {
      type: [String, Array],
      required: false
    },
    // update-begin- --- author:wangshuai ------ date:20190929 ---- for:Jupload组件增加是否能够点击
    disabled: {
      type: Boolean,
      required: false,
      default: false
    },
    // update-end- --- author:wangshuai ------ date:20190929 ---- for:Jupload组件增加是否能够点击
    //此属性被废弃了
    triggerChange: {
      type: Boolean,
      required: false,
      default: false
    },
    fileSize: {
      type: Number,
      required: false,
      default: 20
    }, max: {
      type: Number,
      required: false,
      default: 5
    },
    returnUrl: {
      type: Boolean,
      required: false,
      default: true
    },
    number: {
      type: Number,
      required: false,
      default: 0
    },
    buttonVisible: {
      type: Boolean,
      required: false,
      default: true
    },
    multiple: {
      type: Boolean,
      default: false
    },
    beforeUpload: {
      type: Function
    },
    valueCopy: {
      type: [String, Array],
      required: false
    }
  },
  watch: {
    valueCopy: {
      immediate: true,
      handler() {
        let val = this.valueCopy
        this.initFileListArr(val)
      }
    }
  },
  computed: {
    isImageComp() {
      return this.fileType === FILE_TYPE_IMG
    },
    complistType() {
      // return this.fileType === FILE_TYPE_IMG?'picture-card':'text'
      return 'text'
    }
  },
  created() {
    let prefix = this.$store.state.user.currentPrefix || ''
    this.uploadAction = fileBaseUrl + prefix + '/sys/common/upload2'
    const token = Vue.ls.get(ACCESS_TOKEN)
    //---------------------------- begin 图片左右换位置 -------------------------------------
    this.headers = { 'X-Access-Token': token }
    this.containerId = 'container-ty-' + new Date().getTime()
    //---------------------------- end 图片左右换位置 -------------------------------------
  },

  methods: {
    initFileListArr(val) {
      console.log('initFileListArr:', val)
      if (!val || val.length == 0) {
        this.fileList = []
        return
      }
      let fileList = []
      for (var a = 0; a < val.length; a++) {
        let url = apiBaseUrlDownload + val[a].uri
        fileList.push({
          uid: val[a].id,
          name: val[a].fileName,
          status: 'done',
          url: url,
          type: val[a].mediaType,
          response: {
            status: 'history',
            message: val[a].fileName,
            result: val[a]
          }
        })
      }
      this.fileList = fileList
    },
    initFileList(paths) {
      console.log('initFileList:', paths)
      if (!paths || paths.length == 0) {
        //return [];
        // update-begin- --- author:os_chengtgen ------ date:20190729 ---- for:issues:326,Jupload组件初始化bug
        this.fileList = []
        return
        // update-end- --- author:os_chengtgen ------ date:20190729 ---- for:issues:326,Jupload组件初始化bug
      }
      let fileList = []
      let arr = paths.split(',')
      for (var a = 0; a < arr.length; a++) {
        let url = getFileAccessHttpUrl(arr[a])
        fileList.push({
          uid: uidGenerator(),
          name: getFileName(arr[a]),
          status: 'done',
          url: url,
          response: {
            status: 'history',
            message: arr[a]
          }
        })
      }
      this.fileList = fileList
    },
    handlePathChange() {
      let uploadFiles = this.fileList
      let path = ''
      if (!uploadFiles || uploadFiles.length == 0) {
        path = ''
      }
      let arr = []

      for (var a = 0; a < uploadFiles.length; a++) {
        // update-begin-author:lvdandan date:20200603 for:【TESTA-514】【开源issue】多个文件同时上传时，控制台报错
        if (uploadFiles[a].status === 'done') {
          arr.push(uploadFiles[a].response.result.fileName)
        } else {
          return
        }
        // update-end-author:lvdandan date:20200603 for:【TESTA-514】【开源issue】多个文件同时上传时，控制台报错
      }
      if (arr.length > 0) {
        path = arr.join(',')
      }
      this.$emit('change', path)
    },
    doBeforeUpload(file) {
      // console.log("上传地址：", this.uploadAction)
      if (this.fileSize > 0) {
        let size = 1024 * 1024 * this.fileSize
        if (file.size > size) {
          this.$antdMessage.warning(`大小不可超过${this.fileSize}M`)
          this.uploadGoOn = false
          return false
        }
      }

      if (this.fileList.length > this.max) {
        this.$antdMessage.warning('最多上传' + this.max + '个文件')
        this.fileList = this.fileList.splice(0, this.max)
        return
      }

      this.uploadGoOn = true
      var fileType = file.type
      if (this.fileType === FILE_TYPE_IMG) {
        if (fileType.indexOf('image') < 0) {
          this.$antdMessage.warning('请上传图片')
          this.uploadGoOn = false
          return false
        }
      }
      // 扩展 beforeUpload 验证
      if (typeof this.beforeUpload === 'function') {
        return this.beforeUpload(file)
      }
      return true
    },
    handleChange(info) {
      console.log('--文件列表改变--', info)
      if (this.fileList.length > this.max) {
        this.$antdMessage.warning('最多上传' + this.max + '个文件')
        this.fileList = this.fileList.splice(0, this.max)
        return
      }
      if (!info.file.status && this.uploadGoOn === false) {
        info.fileList.pop()
      }
      let fileList = info.fileList
      if (info.file.status === 'done') {
        // fileList = fileList.slice(-5);
        if (info.file.response.success) {
          fileList = fileList.map((file) => {
            console.log(file)
            if (file.response) {
              let reUrl = file.response.result.uri
              file.url = getFileAccessHttpUrl(reUrl)
              file.name = file.response.result.fileName
            }
            return file
          })
        }
        //this.$message.success(`${info.file.name} 上传成功!`);
      } else if (info.file.status === 'error') {
        this.$antdMessage.error(`${info.file.name} 上传失败.`)
      } else if (info.file.status === 'removed') {
        this.handleDelete(info.file)
      }
      this.fileList = fileList
      if (info.file.status === 'done' || info.file.status === 'removed') {
        //returnUrl为true时仅返回文件路径
        if (this.returnUrl) {
          this.handlePathChange()
        } else {
          //returnUrl为false时返回文件名称、文件路径及文件大小
          this.newFileList = []
          for (var a = 0; a < fileList.length; a++) {
            // update-begin-author:lvdandan date:20200603 for:【TESTA-514】【开源issue】多个文件同时上传时，控制台报错
            if (fileList[a].status === 'done') {
              var fileJson = {
                fileName: fileList[a].name,
                filePath: fileList[a].response.result.uri,
                fileSize: fileList[a].size,
                fileId: fileList[a].response.result.id
              }
              this.newFileList.push(fileJson)
            } else {
              return
            }
            // update-end-author:lvdandan date:20200603 for:【TESTA-514】【开源issue】多个文件同时上传时，控制台报错
          }
          this.$emit('change', this.newFileList)
        }
      }
    },
    handleDelete(file) {
      //如有需要新增 删除逻辑
      console.log(file)
    },
    handlePreview(file) {
      var reg = /\w*(?=\/)/
      if (file.type.match(reg)[0] == 'image') {
        this.previewUrl = apiBaseUrlDownload + file.response.result.uri
        this.filePreviewShow = true
      } else {
        window.open(process.env.VUE_APP_API_BASE_URL + '/jksaas-mgt/mgt/' + file.response.result.uri)
      }
    },
    handleCancel() {
      this.previewVisible = false
    },
    //---------------------------- begin 图片左右换位置 -------------------------------------
    moveLast() {
      //console.log(ev)
      //console.log(this.fileList)
      //console.log(this.currentImg)
      let index = this.getIndexByUrl()
      if (index == 0) {
        this.$message.warn('未知的操作')
      } else {
        let curr = this.fileList[index].url
        let last = this.fileList[index - 1].url
        let arr = []
        for (let i = 0; i < this.fileList.length; i++) {
          if (i == index - 1) {
            arr.push(curr)
          } else if (i == index) {
            arr.push(last)
          } else {
            arr.push(this.fileList[i].url)
          }
        }
        this.currentImg = last
        this.$emit('change', arr.join(','))
      }
    },
    moveNext() {
      let index = this.getIndexByUrl()
      if (index == this.fileList.length - 1) {
        this.$message.warn('已到最后~')
      } else {
        let curr = this.fileList[index].url
        let next = this.fileList[index + 1].url
        let arr = []
        for (let i = 0; i < this.fileList.length; i++) {
          if (i == index + 1) {
            arr.push(curr)
          } else if (i == index) {
            arr.push(next)
          } else {
            arr.push(this.fileList[i].url)
          }
        }
        this.currentImg = next
        this.$emit('change', arr.join(','))
      }
    },
    getIndexByUrl() {
      for (let i = 0; i < this.fileList.length; i++) {
        if (this.fileList[i].url === this.currentImg || encodeURI(this.fileList[i].url) === this.currentImg) {
          return i
        }
      }
      return -1
    }
  },
  mounted() {
    const moverObj = document.getElementById(this.containerId + '-mover')
    if (moverObj) {
      moverObj.addEventListener('mouseover', () => {
        this.moverHold = true
        this.moveDisplay = 'block'
      })
      moverObj.addEventListener('mouseout', () => {
        this.moverHold = false
        this.moveDisplay = 'none'
      })
    }

    let picList = document.getElementById(this.containerId) ? document.getElementById(this.containerId).getElementsByClassName('ant-upload-list-picture-card') : []
    if (picList && picList.length > 0) {
      picList[0].addEventListener('mouseover', (ev) => {
        ev = ev || window.event
        let target = ev.target || ev.srcElement
        if ('ant-upload-list-item-info' == target.className) {
          this.showMoverTask = false
          let item = target.parentElement
          this.left = item.offsetLeft
          this.top = item.offsetTop + item.offsetHeight - 50
          this.moveDisplay = 'block'
          this.currentImg = target.getElementsByTagName('img')[0].src
        }

      })

      picList[0].addEventListener('mouseout', (ev) => {
        ev = ev || window.event
        let target = ev.target || ev.srcElement
        //console.log('移除',target)
        if ('ant-upload-list-item-info' == target.className) {
          this.showMoverTask = true
          setTimeout(() => {
            if (this.moverHold === false)
              this.moveDisplay = 'none'
          }, 100)
        }
        if ('ant-upload-list-item ant-upload-list-item-done' == target.className || 'ant-upload-list ant-upload-list-picture-card' == target.className) {
          this.moveDisplay = 'none'
        }
      })
      //---------------------------- end 图片左右换位置 -------------------------------------
    }
  },
  model: {
    prop: 'value',
    event: 'change'
  }
}
</script>

<style lang='less' scoped>
@import '~@/assets/less/public.less';

.uploadty-disabled {
  .ant-upload-list-item {
    .anticon-close {
      display: none;
    }

    .anticon-delete {
      display: none;
    }
  }
}

//---------------------------- begin 图片左右换位置 -------------------------------------
.uploadty-mover-mask {
  background-color: rgba(0, 0, 0, 0.5);
  opacity: .8;
  color: #fff;
  height: 28px;
  line-height: 28px;
}

//---------------------------- end 图片左右换位置 -------------------------------------

//---------------------------- begin 修改文件列表样式 -------------------------------------
/deep/ .anticon-paper-clip {
  display: none;
}

/deep/ .ant-upload-list-item-name {
  padding-left: 0;
  color: @titFont !important;
}

/deep/ .ant-upload-list-item-name:hover {
  color: @normalFont !important;
}

//---------------------------- end 修改文件列表样式 -------------------------------------
</style>